CKOCODIIJANS, LIZARDS, AND SNAKES. 

 Kntania shtalis ohsciira ('ope. 



1075 



Tlie numerous specimens referred to here by Yarrow in his Check- 

 list, i)ages 126 and lL'7, bel(>nj>- to other subspecies. 



EUT.^NIA SIRTALIS SEMIFASCIATA Cope. 



Eniania sirtaUs semifascialus Ooi'E, Proc. U. S. Nat. Mas., XIV, 1892, p. 662. 



This subspecies or geographical race is represented by a number of 

 .specimens in the national collection from northern Illinois and Wiscon- 

 sin. It resembles in general the E. s. sirtalis in colors and proportions. 

 The lower surfaces and the stripes are olivaceous, and the lateral and 

 median stripes are sep- 

 arated by two rows of 

 spots, which occupy the 

 entire width of the space 

 on the sliin, but which 

 do not touch each other 

 as scale markings, the 

 upper row being ranged 

 along the median stripe 

 and the lower along 

 the lateral stripe. The 

 jieculiarity of the form 

 consists in the fact that 

 on the anterior fifth or sixth of the length of the body the spots of the 

 inferior row extend across the lateral stripe, breaking it up into sec- 

 tions. In many of the si)ecimens the spots of the superior row become 

 opposite to those of the inferior row and join them, and the latter again 

 join a row which is below the lateral stripe. The three rows of spots 

 thus become conHucnt fiom crossbars interrnjited only by the median 

 dorsal stripe, as in the Extant ia sealaHs. The bars are much less regu- 

 lar than in that species, the ])ait that crosses the lateral stripe being 

 distinctly contracted and the superior part being mu(;h widened. 



Young specimens recently hatched (150 mm.) exhibit tlie same color 

 character as the adults. 



In four specimens (Cat. No. 8070) of this form the tail measures, 

 resi)ectively, four and eleven-twelfths, four and two fifths, four and 

 three fifths, four and five sixths of the total length. Gastrosteges in 

 one of the same, one hundred and fifty-three; anal, one; urosteges, 

 sixty-one. 



Measuremcnis. — Length of same specimen, 520 mm.; lengtli of tail, 104 

 mm. Length of a larger specimen, 014 mm.; of tail, lOG mm. In sev- 



FiR. 302. 



EUT.ENIA SIKTALIS SEMIFASCIATA COPE. 

 = 1. 



Wisconsin. 



Cat. No. lOSl, n.S.N.M. 



